Study on Reducing Water Evaporation by Floating Solar Module
| Autor: | WU, CHENG-HAO, 吳晟豪 |
|---|---|
| Rok vydání: | 2017 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 105 The problem of evaporation on water in reservoirs and agricultural irrigation has been existed for a long time. In recent years, the rising temperature caused by global warming has made the problem more and more severe. Water evaporation will have a great impact on reservoir and agricultural irrigation. If Floating Photovoltaic Module is used, it can generate electricity, increase solar cell power generation efficiency, and reduce the evaporation of water at the same time. Therefore, it is quite worthy of study and research. In this study, we use Floating Photovoltaic Module to solve the problem of water evaporation on lake, reservoir and water, and then use the water vapor to reduce the solar cell module temperature, enhance the solar cell module power generation efficiency. We focus on three factors, water depth (Dw), the height (H) from Solar cell module to the water, and the coverage area of floating solar module (Asm). After non-dimensionalization, changing Dw to 40mm, 60mm, 80mm, 100mm and 120mm respectively; and H / Dw will result in 0.17,0.25,0.33,0.42 and 0.5 respectively after changing H. And to discuss Asm / At, which result in 0.13, 0.27, 0.4 and 0.53, respectively after changing Asm. As above, we can experimentally find out the effects of these three factors on water evaporation rate. The experiment outcome indicates that the water evaporation rate will be higher when the Dw is deeper, but with the gradual decrease of the ambient temperature, the water evaporation rate of Dw will gradually decrease to the lowest. Besides, evaporation rate will not be significantly affected by the different H / Dw, or even not at all. However, it has a noteworthy impact on the module temperature, the greater the H / Dw, the lower the average temperature of solar cell module, and its temperature difference can be up to 4.5 degrees Celsius. When the Asm / At increases, the evaporation rate will be lower, and the linear trend will decrease gradually. Although different Asm / At will have different evaporation rates, different evaporation rates will not significantly affect the temperature of sun cell module. Based on the above research results, Floating Photovoltaic Module can reduce the evaporation rate of water, and use the evaporation of water vapor to cool the solar cell module, its non-dimensionalization research data and empirical formula can be future reference to Floating Photovoltaic Module system when it is applied to different design sizes. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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